Easy to grow so long as you don't let them freeze, and feed them well in the spring and early summer. Once the trees are established, they'll take up to 4lbs per tree (depending on the size of the tree, of course) of fertilizer to keep them happy. They don't require much in the way of pruning, birds don't mess with them much, and usually only require light upkeep in terms of spraying/pest control. Only downside is that it seems like it takes the fruit FOREVER to ripen, and it won't hurry up any just because you're standing there wanting a delicious fresh orange!